Pipe-holding tool.



W. G. MOORES. PIPE HOLDING TOOL. Arrmoumn run our. 19, 1912.

lTNEs'sg INVENTOR w 5,

i. WM,

M ATTORNEY of its being to unscrew Specificationof Letters Patent.

Patented Apr. 8, 1913.

Application filed October .19, 1912. Serial No. 726,810. v

firmly short pieces of pipe while being threaded with a die, for the purpose of forming them into nipples.

secondary object is to provide such a tool by which nipples 'can be unscrewed from, or screwed onto, a pipe without splitting them or mashing the thread, as often happens when using a pipe wrench.

In the accompanying drawing, Figure 1 is a side elevation of the tool; Fig. 2 is a longitudinal central section of the same; Fig. 3 is a view similar to Fig. 2, showing the jaw in the expanded position; Fig. 4 is a sectional view on the line 4.-4 of Fig. 3.

Referring to the drawing, the shank or main body of the tool comprises a cylindrical portion l,'and a portlon 2 reduced in thickness and of square cross section to allow turned with a wrench when used a nipple from it into place. f;'Said body is formed with a central cylindrical longitudinal bore 3, to receive a stem 4, cylindrical for the greater part of its length, upon a threaded end 6 of which is screwed a thumb nut 7, which can abut against the upper end of the shank. The other end 8 of said stem is slightly conical and surrounding said conical portion-* are jaws 9, which are here shown as two in number, although they may be three, four, or more in number. The inner ends of said jaws are angular and are here shown as of a cross section externally in the form of a square, and are contained within a square recess 11 formed in the lower portion of the body. The outer portions of the jaws are, in general, of a cylindrical form, but are fluted, as shown at 12, and have sharp longitudinal edges over the periphery, so-that their external appearance is that of a reainer. The outermost portion of the body is hollowed out, as shown at 13, beyond the square recess 11, the inner surface of said concavity being cylindrical. The inner sides of the jaws are concaved to fit the outer a pipe or to screw d pressing every part of their fluted surface firmly against the inner walls of the pipe.

In threading a short len form it into a nipple, the jaws, in their contracted position, are first inserted into the pipe, and then the thumb nut is screwed onto the threaded end of the stem, thereby drawing inwardly the conical portion 9 and spreading the jaws apart, so that the held fast to gth of pipe to e run over one end of the pipe, the collar of the stocks being guided by the cylindrical portion 1 of the sh thread is cut, the stem 4 is pressed down so that the or unscrewing a nipple, the jaws, in their position, are inserted thereinto,

a wrench is then applied to the square end 2 of the shan and turned in the proper direction for unscrewing.

Th improved tool the'outside of the pipe never split.

I am aware that pipe threadin" tools have been invented for the urpose'o threa the end of the outsi e ofafirmly holding the inside thereof. proved tool is of a different character and its purposes are also different, firmly hold the interior p1 pe in'the interior for the mg or unscrewi the t reads. I claim A tool of the character described, comprising a shan having an angular portion at one end and a cylindrical portion extending pur enexpanded by screwing up the nut manner a nipple can be'screwed into place.--.

P p wh 3 rp o g the same without injurin g ice "to the other end, said shank being formed with a central longitudinal bore, with an enlarged angular recess at the latter end of said bore, and with a still larger cylindrical 3 recess at the outer end of said angular recess, a stemin said bore threaded at the firstnamed end and at the other end flaring outwardly, and angular jaws loose at both of their ends and having inner angular por- 10 tions. fitting within said angular recess, and 1 flaring inner surfaces surrounding the flar mg end of said stem. I

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM G. MOORES,

Witnesses:

JOSEPH P. SCHWARTZ, J. R. HOLLAND. 

